Animals are a diverse group of living organisms that can be found in many different habitats. Pets, such as cats and dogs, are animals that are kept as companions. A HERD is a group of animals that live and move together, such as cows or sheep. STOCK refers to animals that are bred and kept for their economic value, such as horses or chickens. A FLOCK is a group of birds that fly and move together. DEER are hoofed mammals that are found in woodlands and meadows. OXEN are domesticated animals that are used for labor, such as pulling plows or carts. FAUNA is the collective term for all the animal life in a particular region or habitat. BEASTS are large, wild animals, such as lions or bears. CRITTERS are small animals, such as mice or squirrels. CREATURES are any living organism, including animals, plants, and microorganisms. Fieldmice are small rodents that live in fields and meadows.